/**
 * FileName:      AppVersionUtils
 *
 * @author: ad
 * @version Createdate:     2014-2-20
 * @Description: Modification  History:
 * Date         	Author        		Version        	Discription
 * -----------------------------------------------------------------------------------
 * 2014-2-20
 * Why & What is modified:
 */
package com.jiyiren.retrofitdemo.utils.tool;

import android.content.Context;
import android.content.pm.PackageInfo;
import android.content.pm.PackageManager;

import com.jiyiren.retrofitdemo.utils.LogUtils;

import java.io.ByteArrayOutputStream;

/**
 * 获取App版本信息
 *
 * @ClassName: AppVersionUtils.java
 * @author: ad
 * @date: 2014-2-20
 * @Description:
 */
public class AppVersionHelper {

    /**
     * 获取版本名
     *
     * @param mContext
     * @return
     * @throws Exception
     */
    public static String getVersionName(Context mContext) throws Exception {
        PackageManager packageManager = mContext.getPackageManager();    // 获取packageManager的实例
        PackageInfo packInfo = packageManager.getPackageInfo(mContext.getPackageName(), 0);   //getPackageName()是你当前类的包名，0代表是获取版本信息
        String versionName = packInfo.versionName;
        LogUtils.i("AppVersionHelper", "App Version = " + versionName);
        return versionName;
    }

//    /**
//     * 获取版本号
//     *
//     * @param context
//     * @return
//     */
//    public static int getVersionCode(Context context) {
//        int versionCode = 0;
//        try {
//            versionCode = context.getPackageManager().getPackageInfo(BuildConfig.APPLICATION_ID, 0).versionCode;  // 获取软件版本号
//            LogUtils.i("AppVersionHelper", "App Version = " + versionCode);
//        } catch (NameNotFoundException e) {
//            e.printStackTrace();
//        }
//        return versionCode;
//    }

	public static class Base64Util {

        private static final char[] base64EncodeChars = new char[] { 'A', 'B', 'C', 'D', 'E', 'F', 'G', 'H', 'I', 'J', 'K', 'L', 'M', 'N', 'O', 'P', 'Q', 'R', 'S', 'T', 'U', 'V', 'W', 'X', 'Y', 'Z', 'a', 'b', 'c', 'd', 'e', 'f', 'g', 'h', 'i', 'j', 'k', 'l', 'm', 'n', 'o', 'p', 'q', 'r', 's', 't', 'u', 'v', 'w', 'x', 'y', 'z', '0', '1', '2', '3', '4', '5', '6', '7', '8', '9', '+', '/' };

        private static byte[] base64DecodeChars = new byte[] { -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, 62, -1, -1, -1, 63, 52, 53, 54, 55, 56, 57, 58, 59, 60, 61, -1, -1, -1, -1, -1, -1, -1, 0, 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21, 22, 23, 24, 25, -1, -1, -1, -1, -1, -1, 26, 27, 28, 29, 30, 31, 32, 33, 34, 35, 36, 37, 38, 39, 40, 41, 42, 43, 44, 45, 46, 47, 48, 49, 50, 51, -1, -1, -1, -1, -1 };

        public Base64Util() {
        }

        /**
         * 将字节数组编码为字符串
         *
         * @param data
         */
        public static String encode(byte[] data) {
            StringBuffer sb = new StringBuffer();
            int len = data.length;
            int i = 0;
            int b1, b2, b3;

            while (i < len) {
                b1 = data[i++] & 0xff;
                if (i == len) {
                    sb.append(base64EncodeChars[b1 >>> 2]);
                    sb.append(base64EncodeChars[(b1 & 0x3) << 4]);
                    sb.append("==");
                    break;
                }
                b2 = data[i++] & 0xff;
                if (i == len) {
                    sb.append(base64EncodeChars[b1 >>> 2]);
                    sb.append(base64EncodeChars[((b1 & 0x03) << 4) | ((b2 & 0xf0) >>> 4)]);
                    sb.append(base64EncodeChars[(b2 & 0x0f) << 2]);
                    sb.append("==");
                    break;
                }
                b3 = data[i++] & 0xff;
                sb.append(base64EncodeChars[b1 >>> 2]);
                sb.append(base64EncodeChars[((b1 & 0x03) << 4) | ((b2 & 0xf0) >>> 4)]);
                sb.append(base64EncodeChars[((b2 & 0x0f) << 2) | ((b3 & 0xc0) >>> 6)]);
                sb.append(base64EncodeChars[b3 & 0x3f]);
            }
            return sb.toString();
        }

        /**
         * 将base64字符串解码为字节数组
         *
         * @param str
         */
        public static byte[] decode(String str) {
            byte[] data = str.getBytes();
            int len = data.length;
            ByteArrayOutputStream buf = new ByteArrayOutputStream(len);
            int i = 0;
            int b1, b2, b3, b4;

            while (i < len) {

                /* b1 */
                do {
                    b1 = base64DecodeChars[data[i++]];
                } while (i < len && b1 == -1);
                if (b1 == -1) {
                    break;
                }

                /* b2 */
                do {
                    b2 = base64DecodeChars[data[i++]];
                } while (i < len && b2 == -1);
                if (b2 == -1) {
                    break;
                }
                buf.write((int) ((b1 << 2) | ((b2 & 0x30) >>> 4)));

                /* b3 */
                do {
                    b3 = data[i++];
                    if (b3 == 61) {
                        return buf.toByteArray();
                    }
                    b3 = base64DecodeChars[b3];
                } while (i < len && b3 == -1);
                if (b3 == -1) {
                    break;
                }
                buf.write((int) (((b2 & 0x0f) << 4) | ((b3 & 0x3c) >>> 2)));

                /* b4 */
                do {
                    b4 = data[i++];
                    if (b4 == 61) {
                        return buf.toByteArray();
                    }
                    b4 = base64DecodeChars[b4];
                } while (i < len && b4 == -1);
                if (b4 == -1) {
                    break;
                }
                buf.write((int) (((b3 & 0x03) << 6) | b4));
            }
            return buf.toByteArray();
        }
    }
}
